Under normal circumstances, a Panasonic DMR model DVD player can only play DVDs from the region it is assigned to--a player assigned to Region 1, for instance, can only play DVDs from Region 1. However, you can use the remote to enter a code that unlocks the DVD player, allowing you to play DVDs from all regions.
Turn the player on. Press and hold "Shift" on the remote.
Press "Setup," then release Shift. Press the "Enter" button twice.
Choose "Other" and enter in a region code (for example, enter 0001 for Region 1).
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Press Enter, then "Return" twice. Turn the player off.